यदि $f(\theta) = \cos \theta_1 \cdot \cos \theta_2 \cdot \cos \theta_3 \cdots \cos \theta_n$ है,तो $\tan \theta_1 + \tan \theta_2 + \tan \theta_3 + \cdots + \tan \theta_n =$

  • A
    $\frac{-f^{\prime}(\theta)}{f(\theta)}$
  • B
    $\frac{f^{\prime}(\theta)}{f(\theta)}$
  • C
    $\frac{-f^{\prime \prime}(\theta)}{f^{\prime}(\theta)}$
  • D
    $\frac{f^{\prime \prime}(\theta)}{f^{\prime}(\theta)}$

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